I am on hold with my bus conversion till I get a job, so I am thinking about putting on of these http://www.northerntool.com/shop/too...2045_200422045
to keep the battery up on it. I am not sure what is drawing power but not a major concern as I have a deep cycle battery on it to to start it for now.
Its only 17 dollars so not like its a major expense to take on, the reviews seem to be good just a easy way to keep the battery up with little or not effort.
I think my cig lighter is bad so I may have to replace it but wont be very hard.
Let me know your thoughts.